time line shows that leon panetta and martin dempsey were only alerted after 50 minutes. special operations were not going to respond for five hours. >> gregg: honoring america's veterans. president obama laying a wreath at the tomb of the unknown soldiers at arlington today. then sending this message to our military men and women and their families. >> we take care of our own. we take care of our verses. we take care of your families. not just by saluting i on one way dai, once a year, but by fighting you every day of every year. that is our obligation, a sacred obligation to all of you. >> gregg: national correspondent steve centanni with more. steve, what was unusual about today's commemoration? >> reporter: the vietnam memorial to mark the 30th anniversary of its dedication. the wall contains the numbers names of 58,000 americans killed in vietnam between 1958 and 1975. the name carved in the panels. ceremony, general a general was the main speaker. >> all of us who fought in vietnam came home changed, older than our years, tougher, more serious, no less vital but som